Speaking trumpet of the azimuth-measuring type



Sept. 22, 1925. 1,5545% J. B. PERRIN ET AL SPEAKING TRUMPET OF THE AZIMUTH MEASURING TYPE Filed Feb. 1, 1924 3 Sheets-Sheet 1 Sept 22, 1925.

J. B. PERRIN ET AL SPEAKING TRUMPET OF THE AZIMUTH MEASURING TYPE Filed Feb. 1. s Shee ts-Sheet 2 Sept. 22, 1925. 1 1,554,595 J. B. PERRIN ET AL SPEAKING TRUMPET OF THE AZIMUTH MEASURING TYPE Filed Feb. 1, 1924 I5 Sheets-Sheet 5 q mu ' f "r hvI htl n relat Patented Sept. 22, 1925.

I nerars m PEnRIN AND enniai: JnLEsMeRGELIn, or nexus, FRANCE."

S.,?EAKI1\IG TBUMlET or THE ezmwa-MsesII-hihe Tyre I ml fi led {February @ZZ' 7907101"! it may concern:

Bel i k iewn t at e, EA B lT- T paratus of the double acting type which 433L116 used as a Speak ng t mne hei -er ah'd'ie' in n feh fly f th tr ns-t sl ss e of e d slor an xc ang of verba ieflfih eat c is o hea v e e e- T ap- 20. b h e iatete a ordi ste azimut hat .whe heed a a speaking t ump if :be directed towards the persons wh ch are t be comm n c ted with, whi e "th ther ,h n lthe apparatu l r the lem eei e de, or in a ce .slg-

"thdf eme l g ouse, a ot e Lesser-trim u e d i iesgy.

- range, n w ereof he ch mb -e Qausedtoterminate at a suitable .switehing TWO bes. pr ce g rom; th

' "device. lette de i eer ee eet enne t d'a a speaking trumpet mouthpiece and'vvith arr-*eargpiece. The said switching device.

cgnsis'ts essentially of a revoluble drum con-.-

nec'tingthe amplifying device "with either" of the said pipes. The whole apparatus can be rotated on a vertical axis for azimuth orientation, and it is provided with a needle co-operating with a graduated scale.

In the appended drawings, Figs. 1 to 4 show by way of example an apparatus having a single ear-piece, in accordance with our invention.

Fig. 1 is a front elevation and Fig. 2 a side elevation. Fig. 3 is a sectional view showing the revoluble switching device. Fig. 4 is a top plan view.

Figs. 5 and 6 refer to an apparatus with a single earrpiece but having a greater range han the preceding.- Fig. .5 is an el Principlesand 8 hew the sw tchates; whi h i lg k the k n spe kin @n h ee si vmea te upo hq tin a 'seeq dp g e :2 end ng in. meter-pi ce 22- .th s t nn r h pera r. .e n re a '1 42 se a N?- ew rational View partlyflilrsec io and F g s t ar iew?" F 7 and *el etea fl app aw .withidouble efai gj e; based 91. th I sam ing device in both positions ig, 9 is a a mm t 3% "Y W e it par t s? rv l lth apparatus. hefl hg h Figs te f the e H f mP-ll yil gdfi fifi 1 1s a trumpe e .pl y .YP d ice i mount d time h aeke 2v whi hfis reve- .lub en area-me a f d' yashhp r U99 helewer partcf sai .hra' eh i fixed 'apo be etne a ea engthele ehla .azimi' t S al ebe ne ,hy the i iippott The coll ct n elem n .6 of th amp-11eing de ice a en arge Port n 7 9mmhh eating' with the leo dh t f and 1 Within th said nlarged Portio is wer hhle e I hi i fllo aving therein t e honda 1. whereby th ele en 6 can h eo .ne d with the a iduit' 8 er. the. condu 9; theeeid drum i controlled by th red 1 end hgiin a kneb .lfi'withi re of he i2e at fi! he .khebih 111s pse era ly pr vided Livith an arm 1. 4.:e -IhPe. ting i t et' p-pie es .15, 16 awa ding .t' f ;ithel. oihmun e'ati' nte'he efieet cl-j f" i I e nduit '8. iieee a eted w th a ri ,pipei p1,? ending- "the acous tr mpet 1 the" ,eehdhit' '9 1'. e lin eteslkwit i P p hfw hg a hal -.iein' 20 "which is pivote efie' iiqhalty hile th an ,ai' ta .r te is hehledte a h y mann the direction of the'inaximum intensity of sound from a source whose azimuth he is engaged in determining.

Further, the height of the said ear-piece can be adjusted in accordance with the observers body; the said piece can be inserted in the right or the left ear, and the pipe 21 may occupy the position shown in full lines in Fig. 4, or the position 21' shown in dotted lines. The tube carrying the ear-piece can be folded back after use. At the upper part of the amplifying device are disposed the sighting means 23 by which the apparatus can be directed towards the person with whom communication is to be made.

It may be advantageous to allow the amplifying device to oscillate thr g a e 1 tain number of degrees in the horizontal direction so as to be directed according to positive or negative sites, and in this event it is movable on the horizontal axis 2 1,

In'the formof construction shown in Figs;

5 and 6, the sound amplifying device consists of four-round elements whereof the conduits 26 end in a main central collecting chamber 27. The apparatus is thus more powerful than the preceding. In this-case the conduits'l? and 19 terminate in the rearof the apparatus vvhereas in apparatus ,shown on, Figs. 1 to 4' corresponding conduits terminated'at the front thereof. In the present dev'icethe sighting means conslst of afieldglass 28. u c

Figs. 7, '8 and 9 showan apparatus on the same principle for usewith both ears,

andit com-prises twoireceivers '29, 29 movable on the vertical, axis; 30 and connected by thefpipes31, 31. withthe switchingde vice 32 which. efiects communication. with j the? speakingjtrumpet 33 ,orl wit h the -two extended by two conduits 38, 39 which come ear-pieces :34, 35., To this ,the said? switching device comprises on the .onehand two diametrically opposite apertures 36, 37

together in asingle conduit 40, terminating onthe other face of the switch in an aperture 41.v With the switching device in the position shown in Fig.- 7, the apertures 36, g 37 coincide respectively with the inlets of.

. the pipes 31, 31 and the aperture 41 coincides with the speaking trumpet 33. The

apparatus now operates as an acoustic trans-1 mitten; The switchingdevice further com:

.prises'two diametrically opposite apertures 42, 43, located ona diameter perpendicular to that upon which theapertures 36, 37 are situated the apertures, are extended. respecj tively by a conduit 44, 45 ending in: an. aperture '46, 47the switching device in the position shown .in' Fig.- 8, the apertures through a quarter of a revolution from one position to the other. e 7 u 1 V The said apparatus is chiefly applicable :for use upon vessels for the'transmission of orders from the captains' bridge torthe crew,

but it is obviously not limited to this'use- What we claim is: 7 l. A speaking trumpet adapted for use as device, a support, a revoluble bracketpivoting on same and bearing the sound-amplijying 'device, an-enlarged central collecting element in the sound-amplifying :device, a

a receiver comprising a sound-amplifying revoluble drum in the collecting element, a

.rod" controlling the rotation of thesaid drum, a double: series of seats at one end of the drum, a conduit system in the drumcommunicating with either oneof these series of seats and at the opposite end of the said drum with the collecting element, an acoustic :3

trumpet and ear pieces communicating re- :spectively with'the; co rresponding series of seats.

device, a support, a revolublebracket pivoting onsame and bearing th -:sound amplifying device, a pointeradapted to the bracket,

an azimuth scale borne by the support and. cooperating with the pointer, an enlarged central collecting element in the sound-amplifying device, a revoluble drum in the :col-

lecting element, a'rod controlling' thefrotation of the' said drum, a double series of, seats at one endof the drum, a curved con duitsystemrin the drum communicating with either one of these series of seats and at the opposite end of the said drum with the collecting element, an acoustic trumpet and ear pieces communicating respectively with the corresponding series of seats, a. ball joint .whereon Leach ear-piece is mounted, and sighting means revoluble together withfthe soundamplifying device.

'1 In witnesswhereof they have t their hands. I

' JEAN BAPTISTE ERRIN; ANDRE J LEs MAROELVIN.

2. A. speaking trumpet adapted for "use as 'a receiver comprising a sound amplifying" 

